Body fat ratio refers to the proportion of the body fat weight in the overall body weight, also known as the percentage of body fat, which reflects the amount of fat in the body.Knowing your body fat rate (body fat rate) can also help you determine if your weight loss goals are realistic.Remember, losing weight is not the same as losing weight.Measurement requires good habits, even when using equipment to measure.The best time to do this is in the morning.The measurements of your weight, waist circumference, and so on are most accurate right after you wake up from adequate sleep (7-8 hours).